From: Peter Zijlstra <peterz@infradead.org>
To: kan.liang@linux.intel.com
Cc: acme@kernel.org, mingo@kernel.org, linux-kernel@vger.kernel.org,
eranian@google.com, namhyung@kernel.org, jolsa@redhat.com,
ak@linux.intel.com, yao.jin@linux.intel.com
Subject: Re: [PATCH 03/12] perf/x86/intel: Add perf core PMU support for Sapphire Rapids
Date: Tue, 26 Jan 2021 15:43:41 +0100 [thread overview]
Message-ID: <YBAqnSlLUpBHOWRY@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1611088711-17177-4-git-send-email-kan.liang@linux.intel.com>
On Tue, Jan 19, 2021 at 12:38:22PM -0800, kan.liang@linux.intel.com wrote:
> @@ -2319,6 +2474,17 @@ static void __icl_update_topdown_event(struct perf_event *event,
> {
> u64 delta, last = 0;
>
> + /*
> + * Although the unsupported topdown events are not exposed to users,
> + * users may mistakenly use the unsupported events via RAW format.
> + * For example, using L2 topdown event, cpu/event=0x00,umask=0x84/,
> + * on Ice Lake. In this case, the scheduler follows the unknown
> + * event handling and assigns a GP counter to the event.
> + * Check the case, and avoid updating unsupported events.
> + */
> + if (event->hw.idx < INTEL_PMC_IDX_FIXED)
> + return;
> +
> delta = icl_get_topdown_value(event, slots, metrics);
> if (last_slots)
> last = icl_get_topdown_value(event, last_slots, last_metrics);
Is this a separate patch?
next prev parent reply other threads:[~2021-01-26 14:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 20:38 [PATCH 00/12] perf core PMU support for Sapphire Rapids kan.liang
2021-01-19 20:38 ` [PATCH 01/12] perf/core: Add PERF_SAMPLE_WEIGHT_EXT kan.liang
2021-01-26 14:42 ` Peter Zijlstra
2021-01-26 15:33 ` Liang, Kan
2021-01-26 15:55 ` Peter Zijlstra
2021-01-19 20:38 ` [PATCH 02/12] perf/x86/intel: Factor out intel_update_topdown_event() kan.liang
2021-01-19 20:38 ` [PATCH 03/12] perf/x86/intel: Add perf core PMU support for Sapphire Rapids kan.liang
2021-01-26 14:43 ` Peter Zijlstra [this message]
2021-01-26 15:34 ` Liang, Kan
2021-01-26 14:44 ` Peter Zijlstra
2021-01-26 15:44 ` Liang, Kan
2021-01-27 19:16 ` Peter Zijlstra
2021-01-26 14:49 ` Peter Zijlstra
2021-01-26 15:37 ` Peter Zijlstra
2021-01-26 16:21 ` Liang, Kan
2021-01-19 20:38 ` [PATCH 04/12] perf/x86/intel: Support CPUID 10.ECX to disable fixed counters kan.liang
2021-01-26 15:44 ` Peter Zijlstra
2021-01-26 15:53 ` Peter Zijlstra
2021-01-19 20:38 ` [PATCH 05/12] tools headers uapi: Update tools's copy of linux/perf_event.h kan.liang
2021-01-19 20:38 ` [PATCH 06/12] perf tools: Support data block and addr block kan.liang
2021-01-19 20:38 ` [PATCH 07/12] perf c2c: " kan.liang
2021-01-19 20:38 ` [PATCH 08/12] perf tools: Support PERF_SAMPLE_WEIGHT_EXT kan.liang
2021-01-19 20:38 ` [PATCH 09/12] perf report: Support instruction latency kan.liang
2021-01-19 20:38 ` [PATCH 10/12] perf test: Support PERF_SAMPLE_WEIGHT_EXT kan.liang
2021-01-19 20:38 ` [PATCH 11/12] perf stat: Support L2 Topdown events kan.liang
2021-01-19 20:38 ` [PATCH 12/12] perf, tools: Update topdown documentation for Sapphire Rapids kan.liang
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